According to Piaget, a cognitive development begins with the ______stage and ends with the _________stage.

Piaget's theory give us four stages of cognitive development, in this order:
1. Sensorimotor stage (from birth - age 2)
2. Pre-operational stage (from age 2- age 7)
3. Concrete operational stage (from age 7 - age 11)
4. Formal operational stage (from age 11 or 12, and beyond)
So it's clear to us which stage is the first,
and which stage is the last.